stone medieval wall against a cloudy blue sky. red kremlin wall in moscow, a historical landmark of russia. battlements of the wal

against airplane architecture background battlements beauty blue brick castle city clouds cloudy construction contrail day defense detail europe exterior fence feudal flying fortifications historical jet kremlin kremlinwall landmark loopholes medieval medievalcastle medievalwall moscow moscowkremlin old place plane red redsquare russia russian sky stone structure summer sunny tile top tourist travel wall